Clone this repository, and then run docker-compose build followed by docker-compose run.
You should be able to see something like this:
$ docker-compose build
Building hello-world
[+] Building 18.3s (18/18) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 44B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/python:3 1.4s
=> [internal] load build context 0.0s
=> => transferring context: 12.99kB 0.0s
=> CACHED [builder 1/9] FROM docker.io/library/python:3@sha256:22d67fbf4849f06491933f273526e425342b210e9c8b90052708c09a00f6154f 0.0s
=> [builder 2/9] RUN curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python - && ln -s "$HOME 8.8s
=> [builder 3/9] WORKDIR /usr/local/build 0.0s
=> [builder 4/9] COPY pyproject.toml poetry.lock ./ 0.0s
=> [builder 5/9] COPY third_party ./third_party/ 0.0s
=> [builder 6/9] RUN poetry export -f requirements.txt -o requirements.txt --without-hashes 1.6s
=> [builder 7/9] WORKDIR /usr/local/hello-world/ 0.0s
=> [builder 8/9] COPY . /usr/local/hello-world/ 0.0s
=> [builder 9/9] RUN rm -rf third_party 0.2s
=> [stage-1 2/5] COPY --from=builder /usr/local/build/ /usr/local/build/ 0.0s
=> [stage-1 3/5] RUN pip3 install --no-cache-dir -r /usr/local/build/requirements.txt && rm -rf /usr/local/build ~/.cache/pip 5.5s
=> [stage-1 4/5] WORKDIR /usr/local/hello-world/ 0.0s
=> [stage-1 5/5] COPY --from=builder /usr/local/hello-world /usr/local/hello-world/ 0.0s
=> exporting to image 0.4s
=> => exporting layers 0.4s
=> => writing image sha256:3432fda263b67f79beec305978962acbcccbb8b12148034400c11c85a5780743 0.0s
=> => naming to docker.io/library/multistage-dockerfile-demo_hello-world 0.0s
$ docker-compose run hello-world
Creating multistage-dockerfile-demo_hello-world_run ... done
Python 3.9.6 (default, Jun 29 2021, 19:18:53)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.25.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import hello_world
In [2]: